Archived threads in /sci/ - Science & Math - 565. page
Images are sometimes not shown due to bandwidth/network limitations. Refreshing the page usually helps.
Name a better calculator.
Protip: You can't.
ti nspire CX CAS
>>7711381
Can it play DOOM?
>Not ripping and tearing during lectures
>>7711381
ti89
Hi /sci/, so i have a project due tomarrow, i need to make a bridge out of toothpicks. It has to span 40 cm with room for a block of 14x9 cm to put weights on. All i can use is this glue and toothpicks. This is what I have so far. Any ideas anons?
![030[1].jpg](https://i.imgur.com/VLBEXxL.jpg "030[1].jpg")
>>7711090
>tomarrow
see the problem with the toothpick bridge project is the glue needs time to dry. no matter how good your design is, the bridge will fail because of the not quite dry glue.
this means you do not have time to make an elegant design, like the girl who will win this year with a beautiful thin sloping style. you will have to make a design similar to this piece of shit this girl is holding, just a garbage amalgam of toothpicks and glue which will be destroyed immediately
>>7711096
All the pieces in pic have been drying for 24+ hours
Are you going for a design like this?
This is not a homework question, I just think I just fucked up my final.
How would I solve this for sigma?
I really thought the only way would be to use logarithms.
>>7711077
You do, you use the natural log.
>>7711080
That's really the only way to bring down an exponent like that then right?
>>7711084
Yep!
What should a freshman CS major like myself be doing this summer? I'm not really sure if I want to do grad school or go into industry but I'm leaning for grad school. Are REU gigs hard to get? Or should I just pester some professors here? Alternatively, I might be able to score a decent paid software engineering internship based on connections.
>>7711021
>another one takes the meme
>and another one gone
>and another one gone
>another one takes the meme
>>7711024
What'd I do?
>>7711021
Do you actually know how to program?
Ok /sci/ please help me I'm probably retarded. Why does length contract as you approach the speed of light? Everything I'm seeing implies that its simply the fact that simultaneous measurements in one frame are not necessarily the same in the next frame, right? So why then is length contraction not essentially considered an illusion as a result of time dilation? Length isn't actually changing right, so really its just time?
>>7710970
length is actually changing
>>7710974
but how does that work? Whats the logic behind it?
>>7710975
https://en.wikipedia.org/wiki/Special_relativity
Is licking someone's eyeball dangerous?
I really wanna do it but I'm afraid there might be bacteria living on the cornea or on the conjunctiva. Can I get an infection from licking another person's eye?
>>7710919
what are you, a fucking faggot?
>>7710919
No but you might kill or make the other person go blind you dumfuck
>>7710982
why?
So i understand that enzymes lower a substrates required activation energy and allow them to function at a much high rate. My q is there is no free energy. So where does the energy that the enzyme uses to lower the EoA come from and how does an enzyme lower the energy of activation specifically. thanks
>>7710879
It all depends if the reactuon first starts in the presence or absence of oxygen to obtain the energy. If there is a lack of oxygen the energy produced is very low and has the byproduct lactic acid as you know. This energy drives the pathway to begin in zero and first order kinetics. The enzyme uses the energy to quickly break the bonds of a substance. I hope this helps.
>>7710901
that did not help at all. what does areobic or anerobic conditions have to do with enzyme activity? i'm talking about their activity in the context of the human body. We are not talking about gylcogenisis or glyconeogenisis or metabolism. ..
>>7710879
It comes from weak interactions between the enzyme and the substrate, such as Van der waals etc.
The activation site on the enzyme provides an ambient that stabilizes, using these interactions, the transition state of the reaction.
So the probability of the reaction going from either sides is more balanced, requiring less energy to push the transition state to the products.
The key thing is to understand that the enzyme is specific to the transition state, not to the substrate or the product.
IT'S HAPPENING!!!1!!1
>We shall define an interesting problem called MAS. We show MAS is a succinct version of
the known problem SUBSET–PRODUCT.
>When we accept or reject the succinct instances of MAS, then we are accepting or rejecting the equivalent large instances of SUBSET–PRODUCT.
>If we assume that P = NP, then the problems MAS and SUBSET–PRODUCT could be in
P–complete.
>However, this would imply that MAS is also in EXP–complete,...
Comment too long. Click here to view the full text.
>>7710842
>applying the reductio ad absurdum rule
No real proof would ever say that.
Is this for real? Could OP remind the general public what the complexity classes P and NP mean?
>>7710847
>P=NPists in denial
1. Can something exists if it has no quantifiable value?
2. In magic the gathering why can't a 0/1 deathtouch kill other creatures? It has death damage and it can attack and block just like any other death touch creature. Is 0 not a number?
>>7710786
I mean the concept of things can still be there.
Sorry for english I am Russia
>>7710791
Right but can something hold relevance when at a state of current innate or anti-ness?
evanomycin, C7H8O3 is very unstable acid isolated from a certain type of bacteria.
evanomycin displays peaks in the IR region at: 3450(br), 1710, 1639, and 886 cm-1
evanomycin absorbs H2 to give a different acid [IR 3450(br), 1739, 1710]
ozonolysis of evanomycin yields formaldehyde and an acid, which on further oxidation with kmno4 gives glutaric acid.
what is the structure of evanomycin?
>>7710743
>evanomycin, C7H8O3 is very unstable acid
that doesn't sound good
>isolated from a certain type of bacteria
need to see a doctor for that
>evanomycin displays peaks in the IR region at: 3450(br), 1710, 1639, and 886 cm-1
I heard about this, last time it happened 20 people died
>evanomycin absorbs H2 to give a different acid [IR 3450(br), 1739, 1710]
pretty sure that's classified as pedophilla.
>ozonolysis of evanomycin yields formaldehyde
that shit is nasty!
>which on further oxidation with kmno4 gives glutaric acid.
jesus christ, that sounds painful
>what is the structure of evanomycin?
None of your bussness.
>>7710763
pc only bro
>>7710743
Just reduce a Glutaric acid into Glutaraldehyde (reversing the step it gives you). Now set glutaraldehyde next to a formaldehyde, and pick the oxygens to subtract that were added via ozonolysis. Don't really feel like drawing it out myself but it shouldn't be hard at all. Then use the IR data to check/add anything necessary.
Do you find yourself studying less and less for finals each semester?
>>7710735
haha y
>>7710735
weird seeing a cow in a scientific setting that isn't spherical
yeah the semester after I graduated I didn't study for finals at all
>The proof is really quite trivial
>mfw it's not
>>7710502
People tend to be confused by the mathematical usage of "simple" and "trivial", assuming they mean "easy."
They don't.
"Trivial", for a proof, can mean a few things.
>It is easy
>That the premises P "trivially" imply the result, because the result Q is always true regardless of the premises (proving that Q is always true, however, may be very much not easy)
>That...
Comment too long. Click here to view the full text.
>>7710520
When used by mathematicians, it means "able to be solved", regardless of how many notebooks you need fill up with calculations in order to find the solution.
>>7710588
Not when used right. Frankly, I would never said "the proof is quite trivial" because it's pretty rude and counterproductive to anyone involved, but I've seen it used justifiably before.
Is there such a thing as being 'shit at math' when you're good everywhere else?
Does it just stem from lack of drive and laziness?
yeah, and low iq
I am good at physics but suck at calculus. But this calculus is like a really difficult theory course and not your normal calculus. We do a lot of proofs. I don't know what you mean math but I figure if it was just computation calculus with no proofs then I would do well but as it stands down now I have a much higher mark in my other classes than calculus.
>>7710474
>good at physics
>suck at relatively basic mathematical proofs
oh boy you're in for a treat
Why are these called closed forms: pi, e, sqrt(2), ln(3)
Why aren't integrals called closed forms?
What's the point of finding closed forms of integrals or sums?
>>7710383
It actually characterizes the functions into certain groups or categories depending on whether you can find elementary antiderivatives for example. It's a very strong theoretical study, at first sight it's obviously dumb just like "straightedge-compass constructions" seems arbitrary and dumb until you use field theory to study it
>>7710383
>Why are these called closed forms: pi, e, sqrt(2), ln(3)
Closed form is a hazy definition to begin with in my experience. Generally it refers to elementary functions like Sin[x], Sqrt[x], Exp[x], Log[x] or constants like Pi. I can't tell you why such functions are considered elementary. For example, the error function has a relation to Exp[x] but it is considered special.
>Why aren't integrals called closed forms?
Not all integrals...
Comment too long. Click here to view the full text.
>>7711042
yeah, closed is sort of a social definition. functions or constructions are considered 'closed' when there is a concensus that they are easy to work with or considered familiar enough to us.
>4am
>finals in the morning
>starting to hallucinate
>can't even solve this
JUST
>>7710304
Shit-tier architecture class like the one I had.
Just use common sense desu, it's piss easy if you know your definitions.
>>7710304
Go to bed. Every second of studying you do at this point is actually negative value - the missed sleep hurts your performance than the studying helps.
>tfw got a B+ in architecture
By the grace of god. I don't even know how I pulled it off. I thought I was failing everything except the projects.
